摘要： 利用5（A）×2（R）两组亲本杂交的10个杂种及其相应的亲本材料，探讨高产条件下K、V型小麦的杂种优势。结果表明：单株产量有很强的杂种优势，7个组合超双亲平均值为7.11%~25.1%,其中3个为15.7%~25.1%,4个组合超标优势2.4%~18.1%.K、V型杂种优势的主要表现是千粒重的增高，其次是穗粒数，有3个组合超双亲平均值。单株穗数的减少对杂种产量有影响，选择多穗亲本，对提高杂种的穗数有效

关键词: K、V型杂种小麦, 杂种优势, 配合力

Abstract: By Using of 10 F₁ hybrids derived from the diallel cross of 5 K,V-cytoplasmic A-lined and each of 2R-lines as well as their parents,the heterosis of K, V-cytoplasmic hybrid wheat was studied under high yield condition.The results showed that hybrid with K, V-cytoplasm had very high heterosis in the grain yield per plant,7 crosses yielded 7 11%-25 1% more than the average of both parents, where 3 crosses of them were 15 7%-25 1%,4 crosses increased 2 4%-18 1%.The heterosis mainly showed higher 1000-grain weight and then the grains per spike,and 3 crosses surpassed the average of both parents.Reduction of spikes per plant effected the yield of hybrid. The spikes of hybrid wheat could be increased by selecting the parents with more spikes.

Key words: K,V-cytoplasmic hybrid wheat, Heterosis, Combining ability

中图分类号: 

• S512.035